Here is the full list of all 14 Rebound achievements.
Blow up a ball 10 times.
Grab 50 powerups.
Survive for a minute in survival mode.
Survive every event in a single round of Survival Mode.
Beat Dualzen, Quadron, and Cyclone all in one round.
Get your first quad combo!
Get your first super combo!
Get your first Mega Combo.
Get your first ultra combo
Get your first monster combo!
Play Zen Mode for 10 minutes.
Kill 10,000 enemy robots.
Clone your balls 10 times!
Kill 30 enemies using the annihilator powerup.